Pump



A. B. STEEN June 17, 1930'.

PUMP

5 Sheets-Sheet Filed July 31, 1926 avwembo'c l-fS-MMM MAW June 17, 1930.A, B, STEEN 1,764,657

- PUMP.

Figled Jul 51, 19 26 5 Sheets-Sheet s Junn, 1930. A. B .STEEN 1,764,657

PUMP

Filed July 51/ 1926 5 Sheets-Sheet 4 A, B. STEEN June 17, 1930.

PUMP

Filed July 51, 1926 5 Sheets-Sheet 5 avwewcoz Paton June 17,

.PAENT time ARTHUR B. scram, OF HOUSTON, TEXAS, ASSIGNOR, BY MESNEASSIGNMENTS, TO THE TEXAS COMPANY, OF NEW YORK, N.

Y., A CORPORATION OF DELAWARE PUMP Application filed July 31,

deep wells and one which does not have to be equipped with sucker rodsand lines which are so enerally employed in pumping wells.

Anot er object of the invention is to provide a pump which operates witha long stroke underground and with a relatively short stroke on thesurface.

A still further object of the invention is to provide a pump which willoperate in a well, the bore of which may not by chance be quitestraight.

One of the features of the inventionis the provision of a piston havingtwo spaced pistonheads of different diameters with means for admittingfluid pressure between the two piston heads. One of the piston heads hasa greater diameter than the other so that the piston is actuated in thedirection of the larger piston head by reason of the excess effectivepressure on that piston head.

Other objects, features and advantagesof the invention will appear fromthe following description thereof when taken in connection with theaccompanying drawings in which:

Fig. 1 is a partially diagrammatic view ofthe surface equipmentillustrating its relation to and its connection with the well cas- Figs.2, 3, 4, 5, 6 and 7 are views of vertical sections of the pumpingapparatus within the casing, which taken collectively, and with Fig. 2at the top and Fig. 7 at the bottom and with the other sectionsinterposed in their proper order, show a vertical section. through thelength of the underground pumping apparatus.

Fig. 8 is a sectional line 8-8 of Fig. 2.

' Fi 9 is a sectional plan view taken on the line 9-9 of Fig. 3.

Fig. 10 is a vertical sectional. View of an auxiliary pump.

plan view taken on the 1 Fig. 11 shows, on a reduced scale, the

assemblage of parts shown in the preceding es. %gferring now tothe-drawings, and for 1926. Serial, no. 126,302.

the moment more particularly to Figs. 2 and 6, it will be seen thatthere is provided an outer casing or tubing 10 composed of one or moresuitabl connected sections of pipe, and an inner tu ing 11 similarlyconstituted.

The casings .10 and 11 are connected to a coupling member 12 which isprovided with a plurality of longitudinal passages 13 which communicateat their upper ends with the annular space between the casings 10 and11. The member 12 is also formed with a circular bore 14 which is incommunication with the lower end of the casing,11.

The member 12 is formed with threaded circumferential sections atdifferent diameters so that an outer casing .15 and an inner casing 16may be attached thereto, yet spaced from one another. A plurality oflateral or inclined passages 17 extend from the bore 14 of the member 12to the annular space between the lower casings 15 and 16, while thelower ends of the passages 13 in the member 12 are in communication withthe inner casing 16 which constitutes the upper barrel of the pump.

The upper barrel 16 communicates with a lower barrel 18 of reduceddiameter through a-swaged niplple 19, and the upper and lower barrelstoget er constitute a workingbarrel. Extending through the workin barrelsections 16 and 18, isa hollow va ve or piston 25 and at the upper endof the. piston head 'rod- 20 at either end of which is a piston there isa cage 26 in which the valve 23 is positioned. The lower piston head 22likewise com leathers 27 and a 'i prises a plurality-of cu valve cage 28to limit t e movementof the valve 24in a downward direction. The lowerpiston head 22 is attached to the lower end of the valve or-piston rod20 by means of a crown 29 which is provided with a pin 30 to limit theupward movement of the valve 24.

as will presently be described, and actuated in any suitable manner. For example, a walking beam 31 mounted on any well known type of Sampsonpost 31 and operated by a power actuated band wheel 31. may be used.Pressure fluid may be stored in a tank 32 which is provided with anoutlet pipe 33 hav-- ing branch lines 3% and 35. The line communicateswith the inner casing 11. which has already been described as beinglocated in a well. The pipe 34 extends to and connects with anauxiliarypump 35 having a piston or plunger 37 (see Fig. 10) which is connectedby means of a rod 38 to the walking beam 31. When the walking beam 31periodically depresses the piston 3?, pressure is exerted through thelines 3d and 35 so as to forcepressure fluid into the inner casing 11.The pipe 33 is provided with a check valve 39 to prevent any upward fiowor return of liquid to the tank 32.

The pressure fluid passes downwardly through the casing 11 and thencethrough the bore 1 1- and out through the lateral or inclined passages17 into the annular space between the casings 15 and 16. The lower endof the casing 15 which does not extend as far into the well as does thecasing 16 is provided with a stufin'g box 40 so that when packing tlandgland 42' are in position a seal'is effected between the lower end ofthe casing 15 and the inner casing 16. At a point immediately above thestufing box 40 the wall of the casing 16 is provided with a plurality ofports or openin s 43 so that the liquid passing downwardly lietween theeasings 15 and 16 will pass into the working barrels consisting of upperand lower barrels 16 and 18 By reason of the fact that weight or sinker4d.

the upper piston. head %1,'positioned within the upper barrel, has alarger effective surface area than the lower piston head 22, which ispositioned within the lower barrel 18, the fluid pressure will operateto raise the piston upwardly.

The downward stroke of the piston is effected by ravity andin order tofacilitate and make tlie downward movement more certain the valve rod 26is provided with a This weight comes to rest in the swagged nipple 19 insuch a manner as to limit the downward stroke, resilient means in theform of acoil sprin 45 being provided to reduce the shock as tie weightcomes to rest.

On the downward stroke of the piston the valve 24: opens to permit oilto fiow into the hollow valve or piston rod 29. On each subsequentdown'ward stroke of the piston more oil is forced into the valve rod andthe excessbey'ond the capacityof the rod is forced out through the valve23 into the pipe or tube may be returned to the storage tank 32 througha line 46 provided with a valve 4?.

Apparatus of preferred form and construction has been illustrated anddescribed for the purpose of showing one way in which this invention maybe practiced, but the inventive thought upon which the invention isbased is broader than this illustrative embodiment thereof, and nolimitations are in tended other than those imposed by the appendedclaims.

What I claim is:

1. Well pumping apparatus comprising a casing extending into a well, ahollow piston rod disposed within the casing and formed with two spacedpiston heads of difi'erent diameters, means for introducing a pressurefluid between the piston heads for actuating the piston rod in thedirection of the larger head,'and a weight on the piston rod foraccelerating the return thereof at the end of each pressure impulse.

2. Well pumping apparatus comprising a casin extending into a well, apiston dispose within the casing and formed with two spaced piston headsof different diameters, means for introducing a pressure fluid betweenthe piston heads for actuating the piston in the direction of the largerhead, a weight on. the piston rod adapted to accelerate the returnthereof at the end of each pres sure impulse, and resilient means in thecas ing for reducing the shock at the completion of the return stroke ofthe piston.

3. Well pumping apparatus comprising an upper pair of concentricallydisposed pipes through the inner of which a fluid pumping medium isintroduced, a lower pair of concentrically disposed pipes, the inner ofwhich constitutes a pump barrel and is formed with a port intermediateits ends, a seal interposed in the space between the lower pipes at apoint beneath the port in the inner pipe, a coupling member forconnecting the two pairs ofpipes comprising a member formed withseparate conduits connecting the inner pipe of each pair with the spacebetween the pipes of the other pair, a hollow piston rod adapted toreciprocatewithin the lower inner pipe, means for limiting the movementof said rod, spaced valved piston heads on said rod, the upper pistonhead being of greater diameter than the lower piston head so that thepumping medium which is introduced through the aforesaid port in the inner lower casing at a point between the piston heads will raise thepiston by reason of I the larger diameter of the upper piston head.

4. Well pumping apparatus comprisin an upper pair of concentricallydisposed pipes through the inner of which a fluid'pumplng medium isintroduced, a lower pair of concentrically disposed pipes, the innerpipe be-' ing formed with a portion of reduced diameter extending belowthe lower end of the outer pipe .and provided with a port in its wallat'a point adjacent the lower end of the outer pipe, a seal interposedin the space between the pipes at a point beneath the port in the innerpipe, a coupling member for connecting the two pairs of plpes comprisinga member formed with separate conduits connectin the inner pipe of eachpair with the space etween the pipes of the outer pair, a

hollow piston rod adapted to reciprocate within the lower inner pipe, avalved piston head on the upper end of said piston rod adapted to form aworking fit with the upper end of the inner pipe, a smaller valvedpiston head on the lower end of said piston rod adapted to form aworking fit with the extended smaller portion of the inner pipe, and

means for forclng a pressure fluid through the port in the wall of theinner pipe to actuate the piston upwardly by reason of the largerdiameter of the upper piston head.

In witness whereof I have hereunto set my hand and seal this 16th day ofJuly, 1926.

ARTHUR B. STEEN.

